Olivieri et al. (2007) described the form M. lokobensis also from Nosy Be Island. The type localities of M. lokobensis and M. mamiratra are the same, and the descriptions of the two forms are identical. Since M. mamiratra has priority, it seems best to consider M. lokobensis a synonym pending further investigation.

Justification:
The extent of occurrence (EOO) of M. mamiratra covers less than 80 km2. This geographic range is severely fragmented and is undergoing continuing decline in area, extent and quality of habitat. Based on these premises, the species is listed as Critically Endangered.

Currently believed to be confined to the island of Nosy Bé in north-western Madagascar. Especially in the small Lokobe Strict Nature Reserve (Andriantompohavana et al. 2006). The extent of occurrence (EOO) is estimated to be less than 80 km2.

Listed on CITES Appendix I. It occurs in the Lokobe Strict Nature Reserve. Unfortunately, although the infrastructure of this reserve is good, it is small. Four individuals of this species are based in the Tsimbazaza Zoo in Antananarivo (E.E. Louis Jr. pers. obs., 2010).